// For flags

CVE-2023-48733

Ubuntu Security Notice USN-6638-1

Severity Score

6.7
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an OS-resident attacker to bypass Secure Boot.

Un valor predeterminado inseguro para permitir UEFI Shell en EDK2 se dejó habilitado en EDK2 de Ubuntu. Esto permite que un atacante residente en el sistema operativo omita el arranque seguro.

Marc Beatove discovered buffer overflows exit in EDK2. An attacker on the local network could potentially use this to impact availability or possibly cause remote code execution. It was discovered that a buffer overflows exists in EDK2's Network Package An attacker on the local network could potentially use these to impact availability or possibly cause remote code execution.

*Credits: Mate Kukri
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2023-12-05 CVE Reserved
  • 2024-02-14 CVE Published
  • 2025-02-13 CVE Updated
  • 2025-04-15 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Canonical Ltd.
Search vendor "Canonical Ltd."
 Ubuntu EDK II
Search vendor "Canonical Ltd." for product "Ubuntu EDK II"
 < 2023.05-2ubuntu0.1
Search vendor "Canonical Ltd." for product "Ubuntu EDK II" and version " < 2023.05-2ubuntu0.1"
en
Affected